Investigation of \({}^9\)Be from nonlocalized clustering concept

The nonlocalized aspect of clustering, which is a new concept for self-conjugate nuclei, is extended for the investigation of the N{\not=}Z nucleus \({}^9\)Be. A modified version of the THSR (Tohsaki-Horiuchi-Schuck-R\"opke) wave function is introduced based on the container picture. It is found that the constructed negative-parity THSR wave function is very suitable for describing the cluster states of \({}^9\)Be. Namely the nonlocalized clustering is shown to prevail in \({}^9\)Be. The calculated binding energy and radius of \({}^9\)Be are consistent with calculations in other models and with experimental values. The squared overlaps between the THSR wave function and the Brink+GCM wave function for the \(3/2^-\) rotational band of \({}^9\)Be are found to be near 96%. Furthermore, by showing the density distribution of the ground state of \({}^9\)Be, the {\pi}-orbit structure is naturally reproduced by using this THSR wave function.